JP2022521882A - Side link communication method, terminal equipment and network equipment - Google Patents

Abstract

The embodiments of the present application disclose methods of side link communication, terminal devices and network devices. The method includes a step in which the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit, a step in which the terminal device transmits and receives the PSCCH in the time frequency resource, and a step. including. The methods, terminal devices and network devices of the embodiments of the present application are advantageous in reducing the complexity of detecting PSCCH by the terminal device as a receiving side. [Selection diagram] FIG. 8

Description

The embodiments of the present application relate to the communication field, and specifically relate to a method of side link communication, a terminal device, and a network device.

New Radio (NR) -In Vehicle to Everything (V2X), to reduce the time delay, to the Physical Sidelink Control Channel (PSCCH) and its corresponding PSCH. Uses a multiplexing structure different from the structure in Long Term Evolution (LTE) -V2X, but the multiplexing structure used in NR-V2X solves how to transmit PSCCH. It has become a problem.

The embodiments of the present application provide a method of side link communication, terminal equipment and network equipment, and are advantageous in reducing the complexity of blind detection by the terminal equipment of PSCCH.

In the first aspect, a method of side link communication is provided, wherein the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit, and the time frequency. In terms of resources, the terminal device includes a step of transmitting and receiving the PSCCH.

In the second aspect, a method of side-link communication is provided, wherein the network device determines a first parameter and the network device transmits the first parameter to the terminal device. The first parameter includes a step for the terminal device to determine the time domain symbol start position of the physical side link control channel (PSCCH) in one time frequency unit.

In the third aspect, a terminal device for carrying out the method in the first aspect or the embodiment thereof is provided.

Specifically, the terminal device includes a functional module for carrying out the method in the first aspect or the embodiment thereof.

In the fourth aspect, a network device for carrying out the method in the second aspect or the respective implementation forms thereof is provided.

Specifically, the network device includes a functional module for carrying out the method in the second aspect or each embodiment thereof.

In a fifth aspect, a terminal device including a processor and a memory is provided. The memory is for storing a computer program, and the processor calls and operates the computer program stored in the memory to execute the method in the first embodiment or the respective implementation forms thereof. Is for.

In the sixth aspect, a network device including a processor and a memory is provided. The memory is for storing a computer program, and the processor calls and operates the computer program stored in the memory to execute the method in the second aspect or the respective implementation form thereof. Is for.

In the seventh aspect, a chip for realizing the method in any one of the above-mentioned first aspect to the second aspect or the embodiment thereof is provided.

Specifically, the chip includes a processor for calling a computer program from a memory and operating the chip, and the device on which the chip is mounted is one of the first to second aspects as described above. You will be able to implement the methods in the embodiments or their respective realizations.

In the eighth aspect, a computer-readable storage medium for storing a computer program is provided, and the computer may use the computer program in any one of the first to second aspects or an embodiment thereof. Perform the method in.

In the ninth aspect, a computer program product including a computer program instruction is provided, and the computer is subjected to the method in any one of the first to the second aspects or the embodiment thereof by the computer program instruction. To execute.

In a tenth aspect, when a computer program is provided and executed on the computer, the computer is to perform the method in any one of the first to second aspects or its respective implementations. become.

By the above technical solution, the terminal device can first determine the time frequency resource of the PSCCH in the first time frequency unit, and can detect the PSCCH in the determined time frequency resource, and the terminal as the receiving side. The device can also clearly know the specific position of the PSCCH in one time frequency unit, and can reduce the complexity of blind detection by the PSCCH terminal device.

It is a schematic diagram of the side link communication system which concerns on embodiment of this application. It is a schematic diagram of the side link communication system which concerns on embodiment of this application. It is a schematic block diagram of the link data transmission method of the side link which concerns on embodiment of this application. It is a schematic block diagram of the setting of the control information and the resource pool of data in LTE-V2X. It is a schematic diagram of the resource allocation method in NR-V2X. It is a schematic diagram of two kinds of structures used for control information and data transmission in NR-V2X. It is a schematic diagram of various substructures contained in structure 2 in NR-V2X. It is a schematic block diagram of the method of side link communication which concerns on embodiment of this application. It is another schematic block diagram of the method of side link communication which concerns on embodiment of this application. It is a schematic block diagram of the terminal apparatus which concerns on embodiment of this application. It is a schematic block diagram of the network equipment which concerns on embodiment of this application. It is another schematic block diagram of the terminal apparatus which concerns on embodiment of this application. It is another schematic block diagram of the network equipment which concerns on embodiment of this application. It is a schematic block diagram of the chip which concerns on embodiment of this application. It is a schematic block diagram of the communication system which concerns on embodiment of this application.

Hereinafter, the technical solutions in the embodiments of the present application will be described with reference to the drawings according to the embodiments of the present application. Of course, the examples described are only a part of the embodiments of the present application, and all the embodiments are described. is not. All other embodiments acquired by one of ordinary skill in the art based on the embodiments in the present application without creative labor are all within the scope of protection of the present application.

The technical solutions according to the embodiments of the present application include a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, and a wideband code division multiple access (CDMA) system. Code Division Multiple Access (WCDMA) system, general-purpose packet radio service (General Packet Radio Service, GPRS), long-term evolution LTE system, LTE frequency division duplex (Flexuency Division) TDD), general-purpose mobile communication system (Universal Mobile Telecommunication System, UMTS), global interconnection microwave access (Worldride Interoperability for Microwave Access, WiMAX) communication system, future application (WiMAX) communication system, WiMAX system You should understand that you can.

In particular, the technical solutions according to the embodiments of the present application are various based on non-orthogonal multiple access technologies such as Space Code Multiple Access (SCMA) systems and Low Density Signature (LDS) systems. It can be applied to communication systems, and of course, in the field of communication, the SCMA system and the LDS system may be referred to by other names. Further, the technical solutions according to the embodiments of the present application are Orthogonal Frequency Division Multiplexing (OFDM) and Filter Bank Multi-Carrier (FBMC) using non-orthogonal multiplex access technology. It can be applied to multi-carrier transmission systems using non-orthogonal multiplex access technologies such as Generalized Frequency Division Multiplexing (GFDM) and Filter Orthogonal Frequency Division Multiplexing (Filtered-OFDM, F-OFDM) systems. can.

The terminal device in the embodiment of the present application is a user device (User Equipment, UE), an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless communication device. , User agent or user device. Access terminals include cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communication functions. Handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in future 5G networks or future evolutionary public land mobile networks (Public Land Mobile Network, PLMN). It may be the terminal device in the above, and the embodiment of the present application is not limited.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a base station (Base Transferr Station, BTS) in a GSM system or a CDMA system, or may be a base station (BTS). , WCDMA® system base station (NodeB, NB), further may be an evolution base station (Evolution NodeB, eNB or eNodeB) in an LTE system, cloud radio access network (Cloud). It may be a wireless controller in the Radio Access Network, CRAN) scene, or the network equipment may be a relay station, an access point, an in-vehicle device, a wearable device, a network device in a future 5G network, or a network device in a future evolution PLMN network. However, the embodiment of the present application is not limited.

1 and 2 are schematic views of application scenes of the embodiments of the present application. FIG. 1 illustrates one network device and two terminal devices, optionally, the wireless communication system may include a plurality of network devices and others within the coverage of each network device. The number of terminal devices may be included, and the embodiments of the present application do not limit this. In addition, the wireless communication system is another network entity such as a mobile management entity (MME), a serving gateway (S-GW), and a package data network gateway (Packet Data Network Gateway, P-GW). However, the embodiments of the present application are not limited thereto.

Specifically, the terminal device 20 can communicate with the terminal device 30 in a communication mode between devices (Device to Device, D2D), and the terminal device 20 can communicate with the terminal device 30 when performing D2D communication, that is, a D2D link, that is, a side link. (Sidelink, SL) directly communicates with the terminal device 30. For example, as shown in FIG. 1 or 2, the terminal device 20 directly communicates with the terminal device 30 by a side link. In FIG. 1, communication between the terminal device 20 and the terminal device 30 is performed by a side link, and the transmission resource is allocated by the network device. In FIG. 2, between the terminal device 20 and the terminal device 30. Communication is performed by the side link, the transmission resource is voluntarily selected by the terminal device, and it is not necessary to allocate the transmission resource by the network device.

The D2D communication mode can be applied to vehicle-to-vehicle (Vehicular to Vehicle, V2V) communication or vehicle-to-everything (V2X) communication. In V2X communication, X can generally refer to any device having a wireless transmission / reception function, and examples thereof include a slowly moving wireless device, a fast-moving in-vehicle device, and a network control node having a wireless transmission / reception function. However, it is not limited to these. It should be understood that the embodiments of the present application are mainly applied to the V2X communication scene, but can also be applied to any other D2D communication scene, whereas the embodiments of the present application are what. There is no limitation.

In version 14 of the 3GPP protocol, LTE-V2X was standardized and two transmission modes, namely transmission mode 3 (mode 3) and transmission mode 4 (mode 4), were defined. In the terminal equipment using the transmission mode 3, the transmission resource is allocated by the base station, the terminal equipment transmits data on the side link based on the resource allocated by the base station, and the base station is used for the terminal equipment. , Can be assigned a single transmission resource or a semi-static transmission resource. When the terminal device using the transmission mode 4 has a sensing function, data is transmitted using the sensing and reservation methods, but when the terminal device does not have the sensing function, the resource pool The transmission resource is randomly selected from. A terminal device with a sensing function acquires a available resource set from a resource pool by a sensing method, and randomly selects one resource from the set to perform data transmission. Due to the periodicity of services in the vehicle's internet system, terminal equipment generally uses a semi-static transmission method, that is, the terminal equipment is multiple after selecting one transmission resource. By continuing to use the resource in the transmission cycle of, the probability of resource reelection and resource collision will decrease. The terminal device carries and reserves the information of the resource to be transmitted next time to the control information transmitted this time, and the other terminal device detects the control information of the terminal device so that this resource is transferred by the terminal device. Determine if it was reserved and used, and achieve the goal of reducing resource conflicts.

In LTE-V2X, the data transmitted by the side link uses a transmission method of side link control information (Siderink Control Information, SCI) + data as shown in FIG. 3, and is carried to SCI here. Is the information required to demodulate data such as modulation and coding scheme (MCS), time-frequency resource allocation information, priority information, etc., and the terminal device as the receiving side detects SCI. By doing so, the time frequency resource position of the data is acquired, and the data is detected in the corresponding time frequency resource. SCI is put on PSCCH, data is put on PSCH, PSCCH resource pool and PSCH resource pool are preset by protocol or network setting, and the terminal device as the transmitting side is PSCCH and PSCH in the corresponding resource pool. Is transmitted, and the terminal device as the receiving side first blindly detects the PSCCH in the resource pool of the PSCCH, and based on the instruction information in the SCI carried to the PSCCH, the SCI in the corresponding time frequency resource of the PSCCH resource pool. Detects the PSSCH corresponding to.

In LTE-V2X, the data and the control information corresponding to the data are located in the same subframe and are FDMs. Specifically, the setting of the control information and the resource pool of the data is adjacent to the frequency domain. There are two types of methods, a non-adjacent method and a non-adjacent method, and the specific relationship is shown in FIG.

Here, the adjacency method means that control information and its corresponding data are adjacent in a frequency domain, the bandwidth of the entire system is a subband as a particle size, and each subband has a plurality of continuous physical resources. A block (Physical Size Block, PRB) is included, and the first and second PRBs in each subband are available control resources (each control information occupies two adjacent PRBs in the frequency domain). The remaining PRBs are available data resources, the data resources correspond to the control resources one by one, and the starting position of the data resources is determined by the corresponding control resources. The data resource may occupy one subband (eg, UE1 in FIG. 4), or may traverse a plurality of subbands (eg, UE2 in FIG. 4), and the data may be plural. When occupying a subband, the frequency domain is continuous within multiple subbands, but control resources within other subbands can be occupied, and at the same time, the control information corresponding to the data is the first sub. It is in the control resource in the band, for example, in FIG. 4, since the data of the UE 2 occupies two adjacent subbands, the corresponding control information is in the control resource of the first subband.

Due to the need to support autonomous driving in NR-V2X, vehicle-to-vehicle data traction has higher throughput, lower time delay, higher reliability, wider coverage, more flexible resource allocation, etc. Demand higher requirements.

In the NR-V2X system, multiple types of transmission modes such as mode 1 and mode 2 are introduced, where mode 1 is when the network allocates transmission resources (similar to MODE 3 in LTE-V2X) to terminals. Yes, mode 2 is for the terminal to select a transmission resource, and mode 2 includes, but is not limited to, some of the following modes:

mode 2a: The terminal is a mode in which a transmission resource (similar to mode 4 in LTE-V2X) is voluntarily selected. For example, the terminal voluntarily selects a resource from a preset or network-configured resource pool (the resource can be randomly selected or selected by a sensing method).

mode 2b: The terminal is a mode for assisting another terminal to select a resource. For example, the first terminal transmits support information to the second terminal, which is available time frequency resource information, available transmission resource set information, channel measurement information and channel quality information (channel state). Information (Channel State Information, CSI), Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indication RI, Reference Signal Receiving Power (Re). ), Reference signal reception quality (Reference Signal Receiving Quality, RSRQ), indication of received signal strength (Received Signal Transmission Indicator, RSSI), line loss information, etc.), but is not limited thereto.

mode 2c: The terminal is a mode for selecting a resource from the set transmission resources. For example, each terminal has a plurality of transmission resources set by the network, and when data transmission occurs on the terminal at the side link, one transmission resource is selected from the plurality of transmission resources set in the network and data is selected. Perform transmission.

mode 2d: The first terminal is a mode in which transmission resources are allocated for the second terminal. For example, the first terminal is a group head for group communication, the second terminal is a group member of the group, and the first terminal is transmitted by a side link for the second terminal. Allocate time frequency resources directly. As shown in FIG. 5, UE1, UE2, and UE3 form one communication group, and UE1 is a group head of the group and has functions such as resource management, allocation, and control, and UE2 and UE3. Is a group member, UE1 can allocate sidelink transmission resources for UE2 and UE3, and UE2 and UE3 perform sidelink transmission with the resources allocated by UE1.

In NR-V2X, in order to reduce the time delay, a new multiplexing structure is utilized in the side link control information SCI and its corresponding data, as shown in FIGS. 6 and 7. Here, C represents control information and D represents data, that is, in one subframe or one time slot, the control information occupies a part of the time domain symbol, and the terminal device occupies the control information. By detecting, the instruction information of the demodulated data can be acquired, and the data can be further detected. By occupying only a part of the time domain symbol in the control information, the control information can be quickly demodulated, and the purpose of reducing the time delay is achieved.

As shown in FIG. 6, the multiplexing structure used in NR-V2X is mainly divided into structure 1 and structure 2. in structure 1, control information can be transmitted before data and is controlled. Information and data occupy different time domain resources, and further, control information and data scheduled by the control information can be transmitted in the same or different time slots. Structure 2 refers to a structure in which the time domain resource of control information is data. Refers to a structure that can partially overlap with the time domain resource of.

The structure 2 may include four types of substructures as shown in FIG. 7, such as substructure 2-1 and substructure 2-2, substructure 2-3 and substructure 2-4.

As can be seen from FIG. 7, with respect to structure 2, the PSCCH time domain resource can occupy any time domain symbol in one subframe or one time slot, and the PSCCH frequency domain resource is also in the system bandwidth. It is possible to occupy a part of the width or a subband of one bandwidth portion (BandwidthPart, BWP), but how to determine the time-frequency resource occupied by the PSCCH is a problem to be solved. There is.

FIG. 8 is a schematic block diagram of the side link communication method 100 according to the embodiment of the present application. The method can be performed by a terminal device as a receiver in FIG. 1 or FIG. 2, and as shown in FIG. 8, the method 100 includes some or all of the following:

In S110, the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit.

In S120, the terminal device transmits / receives the PSCCH in the time frequency resource.

To explain, in the time domain, the first time frequency unit can include one time unit. The time unit may be one subframe or one time slot, or it may be a time unit consisting of a specific number of time domain symbols. In a frequency domain, the first time frequency unit may include one frequency domain unit, which frequency domain unit may be system bandwidth, one bandwidth portion, or a specific number of subs. It may be a frequency domain unit consisting of bands.

Specifically, the transmission of side-link data needs to be scheduled by SCI, that is, SCI carries the information necessary for data demodulation, while SCI is carried on PSCCH, so that side-link communication can be performed. When the terminal device transmits on the basis of one time frequency unit and requires the transmission of PSCCH, the terminal device as the transmitting side is the time domain for transmitting the PSCCH in the current time frequency unit. It is necessary to first determine the time frequency resource including the resource and / or the frequency domain resource, and the terminal device as a transmitting side can transmit the PSCCH in the determined time frequency resource. The terminal device as a receiving side also needs to first determine in which time frequency resource in the current time frequency unit the PSCCH is received or detected, and then receive or detect the PSCCH in the corresponding time frequency resource. ..

It should be understood that for the terminal device as the transmitting side, the time frequency resource of the PSCCH is the transmission resource of the PSCCH, and for the terminal device as the receiving side, the time frequency resource of the PSCCH is the receiving resource of the PSCCH. ..

In particular, the solution according to the embodiment of the present application applies to the multiplexed structure used for the transmission of the PSCCH and PSCH of FIG. 6 or 7, and for the structure 1, the PSCCH and the PSCH scheduled by the PSCCH. Occupies different time domain resources, but for structure 2, the time domain resource occupied by the PSCH scheduled by the PSCCH is larger than the time domain resource occupied by the PSCCH.

Optionally, determination of the PSCCH time frequency resource in one time frequency unit can include determination of the PSCCH time domain resource and / or frequency domain resource in one time frequency unit.

Specifically, the determination of the time domain resource of the PSCCH in one time frequency unit is determined among the start time domain symbol position, the end time domain symbol position, and the number of occupied time domain symbols of the PSCCH in one time frequency unit. Includes at least one confirmation.

Optionally, the number of PSCCH start time domain symbol positions, end time domain symbol positions, or occupied time domain symbols in one time frequency unit can be determined by protocol preset information (eg, protocol pre-promise), network. It may be determined by device configuration information (eg, network devices are set by broadcast messages, Radio Resource Protocol signaling, control information, etc.), or by other terminal devices. good. For example, the other terminal device may be a group head in a communication group having the terminal device.

Optionally, the start time domain symbol position or end time domain symbol position of the PSCCH in one time frequency unit can be by index information of the time domain symbol or by offset with respect to a particular time domain symbol. For example, if the protocol promises that the PSCCH start time domain symbol position in one time frequency unit is the first time domain symbol, the protocol preset information is the first time domain in one time frequency unit. It can include an instruction domain to indicate the index information of the symbol. Also, for example, for a terminal device, if the network device is set so that the end time domain symbol position of the PSCCH in one time frequency unit is the last time domain symbol, the setting information is the last in one time domain unit. It can contain an instruction domain to indicate the index value of the time domain symbol of. Also, for example, for a terminal device, if the network device is set so that the offset of the PSCCH start time domain symbol position with respect to the fourth time domain symbol in one time frequency unit is 2, the terminal device is one. It becomes clear that the start time domain symbol position of PSCCH in the time frequency unit is the sixth time domain symbol. Also, for example, if the protocol pre-promises that the offset of the PSCCH end time domain symbol position with respect to the fourth time domain symbol in one time frequency unit is -2, the terminal device is one time frequency unit. It becomes clear that the end time domain symbol position of PSCCH in is the second time domain symbol.

Optionally, the number of time domain symbols occupied by the PSCCH in one time frequency unit can be indicated by the A bit. For example, when the maximum number of time domain symbols occupied by PSCCH is 4, the number of time domain symbols occupied by PSCCH in one time frequency unit can be indicated by 2 bits.

Optionally, in the embodiments of the present application, the terminal device can also determine the start time domain symbol position of the PSCCH in one time slot or one subframe based on the first parameter. The first parameter may be determined by protocol preset information, network device setting information, or other terminal device setting information. The first parameter may be related to the number of time domain symbols that the terminal device needs to sense or measure in one time frequency unit.

Generally, in one time frequency unit, the terminal device first makes a sensing or measurement and then determines whether it is necessary to transmit a PSCCH and / or a PSCH based on the result of the sensing or measurement. For example, if the number of time domain symbols that the terminal device needs to sense or measure in one time frequency unit is P, the terminal device needs to sense or measure the number of time domain symbols P. Based on (ie, said first parameter), the start time domain symbol position of the PSCCH in one time frequency unit can be determined. For example, the position of the start symbol is P + 1 or P + 2.

As it should be explained, sensing or measurement generally starts with the first symbol of one time frequency unit, and in one time frequency unit, the time domain symbol that the terminal device needs to sense or measure. It can be understood that the number P requires the terminal device to sense or measure the first P time domain symbols in one time frequency unit.

In order to transmit PSCCH and / or PSCH in one time frequency unit, the terminal device determines whether the time slot or subframe is available for transmission of PSCCH and / or PSCH based on the result of sensing or measurement. It is becoming more deterministic, and different terminal devices may also have different sensing or measurement parameters. For example, a network device can set different sensing parameters for different terminal devices, such as the number of time domain symbols whose signal energy measured by the terminal device is below the threshold. The terminal device initializes the parameter based on the network setting information, for example, when the initialization value of the parameter is Q, and the energy at the time domain symbol measured by the terminal device is lower than the threshold value, the parameter. Decreases by 1 and when the energy at the time domain symbol measured by the terminal device is greater than or equal to the threshold, the parameter remains unchanged and continues to measure the energy at the next time domain symbol and the parameter decreases to 0. At the subsequent time domain symbol, the terminal device is adapted to transmit PSCCH and / or PSCH. The parameters for which different terminal devices are set in one time frequency unit may also be different, for example, the parameter may be 2 for the first terminal device and the second terminal device. On the other hand, the parameter may be 3. When sensing or measuring that the energy in two time domain symbols is below the threshold in one time frequency unit, the first terminal device can preempt and transmit the next time domain symbol. When sensing or measuring that the energy in three time domain symbols is lower than the threshold in one time frequency unit, the second terminal device may preempt and transmit the next time domain symbol. can. The terminal device whose sensing parameter is reduced to 0 first can preempt the resource and transmit it.

Therefore, if there is at least one terminal device that transmits PSCCH and PSCH in one time frequency unit, the number of time domain symbols that different terminal devices need to sense or measure may also differ, so different terminals. The start time domain symbol for being able to transmit PSCCH, which is determined by the device, may also be different. Different terminal devices can be made to acquire the same first parameter based on the protocol preset information or the setting information of the network device. Further, different terminal devices can determine to start transmitting and receiving PSCCH from the same start time domain symbol position of one time frequency unit based on the same rule.

Optionally, the first parameter may be the position K of the first time domain symbol for receiving PSCCH in one time frequency unit, where K is an integer. That is, all of the terminal devices as the receiver can transmit PSCCH only with the first parameter or the corresponding time domain symbol after the first parameter, while all of the terminal devices as the receiver can transmit PSCCH. In contrast, in each case, the PSCCH can only be received or detected by the first parameter or the corresponding time domain symbol after the first parameter. For example, the terminal device can directly determine the position of the time domain symbol corresponding to K as the start time domain symbol position of PSCCH in one time frequency unit, and further corresponds to K in one time frequency unit. You can start sending and receiving PSCCH from the time domain symbol. Specifically, when K is the third time domain symbol in one time frequency unit, the terminal device may start transmitting and receiving PSCCH from the third time domain symbol in one time frequency unit, or the terminal. The device may start transmitting and receiving PSCCH from the 4th and 5th time domain symbols in one time frequency unit, and must start transmitting and receiving PSCCH from the time domain symbol before the time domain symbol corresponding to K. Just do it.

Optionally, K may be the maximum value of the start time domain symbol position available for transmission of the PSCCH corresponding to at least one terminal device in one time frequency unit. Since different terminal devices have different numbers of time domain symbols that need to be sensed or measured, the start time domain symbol positions for transmitting PSCCH that different terminal devices can preempt in one time frequency unit are also different. The complexity of detecting PSCCH by the terminal device as a receiver also increases, that is, the terminal device needs to detect PSCCH in all possible time domain symbols. For example, the position of the first time domain symbol that can be used for the transmission of the PSCCH of the terminal device 1 is 1, and the position of the first time domain symbol that can be used for the transmission of the PSCCH of the terminal device 2 is 2. When the position of the first time domain symbol that can be used for the transmission of the PSCCH of 3 is 3, the PSCCH is either the terminal device 1, the terminal device 2, or the terminal device 3 with respect to the terminal device 4 as the receiving side. Since it is not possible to determine whether or not the time domain symbol is transmitted from, it is necessary to start reception or detection from each time domain symbol whose position of the time domain symbol is 1, 2, or 3.

When the maximum value of the start time domain symbol position for transmitting PSCCH, which can be preempted by a plurality of terminal devices in one time frequency unit, can be determined as K, the terminal device as the transmitting side among the plurality of terminal devices is determined. The terminal device as a receiver needs to detect PSCCH in all possible time domain symbols in one time frequency unit, while it can start transmitting PSCCH from the position of the fixed time domain symbol. Instead, the PSCCH can be started to be detected from the position of the fixed time domain symbol. For example, in the above example, the network device can be used for the transmission of PSCCH in the terminal device 1, the terminal device 2 and the terminal device 3 for the terminal device 1, the terminal device 2, the terminal device 3 and the terminal device 4. The maximum value 3 of the position of the second time domain symbol can be set as the start time domain symbol position for transmitting and receiving PSCCH, and either the terminal device 1, the terminal device 2, or the terminal device 3 can be set as the PSCCH as the terminal device. The terminal device 4 as a receiving side can start receiving or detecting the PSCCH from the time domain symbol whose position of the time domain symbol is 3.

Optionally, the first parameter may be the maximum value M of the number of time domain symbols that need to be sensed or measured in one time frequency unit, where M is an integer. That is, while any PSCCH can only be transmitted with the corresponding time domain symbol after the first parameter to all terminals as a sender, any one of them will eventually be sent to all terminals as a receiver. Also, PSCCH can only be received or detected by the corresponding time domain symbol after the first parameter. For example, the terminal device can directly determine the start time domain symbol position of the PSCCH in one time frequency unit as the position of the time domain symbol corresponding to (M + i), and further, in one time frequency unit. The PSCCH can be started to be transmitted / received from the time domain symbol corresponding to the position (M + i) of the time domain symbol. Here, i is a positive integer and can be determined based on the subcarrier interval, the i values corresponding to the different subcarrier intervals are different, and i is the protocol preset information, network device setting information, or It may be determined by the setting information of another terminal device. Optionally, the time domain symbols from (M + 1) to (M + i-1) can be used by the terminal device for transmit / receive conversion / or transmit / receive conversion. Optionally, the terminal device requires at least one time domain symbol for transmit / receive conversion / or transmit / receive conversion. For example, i may be 3 for a subcarrier interval of 120 KHz, and the time domain symbols (M + 1) and (M + 2) may be used for the terminal device to perform transmission / reception conversion. In the case of a subcarrier interval of 30 KHz, i may be 2, where the time domain symbol (M + 1) may be used by the terminal device to perform transmission / reception conversion, but with respect to the subcarrier interval of 15 KHz. , I may be 1, and here, the time domain symbol (M + 1) may be used for the terminal device to perform transmission / reception conversion.

Optionally, M may be the maximum of the number of time domain symbols that need to be sensed for at least one terminal device in one time frequency unit. Since the number of time domain symbols that need to be sensed or measured differs depending on the different terminal device, the maximum number of time domain symbols that need to be sensed or measured in one time frequency unit by multiple terminal devices. When the value is determined as M, the terminal device as the receiving side among the plurality of terminal devices can determine the start time domain symbol position for PSCCH transmission in one time frequency unit based on the same rule. In addition, PSCCH can be started from a fixed time domain symbol, eliminating the need to detect PSCCH at all possible time domain symbols in one time frequency unit. For example, the terminal device 1 needs to sense one time domain symbol, the terminal device 2 needs to sense two time domain symbols, the terminal device 3 needs to sense three time domain symbols, and the network device is a terminal device. 1. Time domain that needs to be sensed in the terminal device 2 and the terminal device 3 The time domain that each terminal device needs to sense in one time frequency unit the maximum value 3 (that is, parameter M = 3) of the number of time domain symbols. If it is set to the maximum number of symbols and is the position of the time domain symbol corresponding to the start time domain symbol position (M + 2) of PSCCH in one time frequency unit set by the protocol promise or network, the terminal device 1, the terminal The terminal device as the receiving side of the device 2 and the terminal device 3 can start receiving or detecting the PSCCH transmitted by another terminal device with the time domain symbol corresponding to the position 5 of the time domain symbol.

Optionally, the determination of the PSCCH time frequency resource in one time frequency unit is also any two of the PSCCH frequency domain start position, frequency domain end position and frequency domain resource length in one time frequency unit. Can include confirmation of.

Optionally, the PSCCH frequency domain start position, frequency domain end position or frequency domain resource length in one time frequency unit may be protocol preset information (eg, protocol pre-promise), network equipment configuration information (eg, eg). The network device may be determined in response to broadcast messages, radio resource control signaling, control information, etc.), or the terminal device as a group head in the communication group in which the terminal device is located. It may be confirmed by the setting information of.

Optionally, the frequency domain start position or frequency domain end position of the PSCCH in one unit can be indicated by the index information of the frequency domain unit or the offset with respect to a particular frequency domain unit. For example, the index information of the resource block or subband or resource block group may indicate the frequency domain start position or frequency domain end position of PSCCH. For example, an offset with respect to a particular frequency domain unit may indicate the frequency domain start position or frequency domain end position of the PSCCH. The particular frequency domain unit is a bandwidth start position, a BWP start position, a resource pool start position, a carrier center frequency domain position, a sync signal lowest frequency domain position, a Physical Sidelink broadcast channel, It may be the lowest frequency domain position of PSBCH).

Optionally, the length of the frequency domain resource of the PSCCH in one time frequency unit may be indicated by the size indication information of the frequency domain resource. For example, the B bit indicates the number of frequency domain units occupied by the PSCCH, and the frequency domain unit may be a resource block, a subband, or a resource block group.

Alternatively, the terminal device may also determine the length of the PSCCH frequency domain resource in one time frequency unit, depending on the aggregation level of the PSCCH to be transmitted. For example, a mapping relationship between the aggregation level and the length of the frequency domain resource, which differs depending on the preset information or the network setting information, may be set, and the terminal device as the transmitting side currently sets the aggregation level of the PSCCH to be transmitted and the mapping. The length of the PSCCH frequency domain resource in one time frequency unit may be determined based on the relationship. If the terminal device as the receiving side already knows the aggregation level of the PSCCH to be received, the terminal device determines the length of the frequency domain resource of the PSCCH based on the aggregation level and the mapping relationship, and the terminal device as the receiving side determines the length of the frequency domain resource of the PSCCH. If the terminal device does not know the aggregation level of the PSCCH to be received, the terminal device has all possible aggregation levels, and the frequency domain of the PSCCH corresponding to each of the aggregation levels based on the mapping relationship. If it is necessary to determine the length of the resource and detect the PSCCH according to the length of the frequency domain resource, and the detection fails, the length of the frequency domain resource of the PSCCH is determined according to the next aggregation level. If it is reconfirmed and the PSCCH is rediscovered and the detection is successful, the aggregation level adopted at this time is the aggregation level used for the PSCCH, and the frequency domain resource of the PSCCH corresponding to the aggregation level. The length is the length of the PSCCH frequency domain resource.

In all of the above embodiments, the various information and parameters of the time domain resource or frequency domain resource for determining the PSCCH are all determined by the protocol based on predefined (ie, preset information) or network configuration information. It may be a new one. For example, a resource pool of PSCCH is set by predefinition by a protocol or by a network, and the setting information of the resource pool includes the above-mentioned various information or parameters. For example, the network device may transmit the setting information by a method such as broadcast information, RRC signaling, downlink control signaling, etc., and the setting information sets at least one PSCCH resource pool, and the setting information of the resource pool is set. Contains the various information or parameters described above. Alternatively, at least one BWP is set by the network device, and the BWP setting information includes the above-mentioned various information or parameters.

FIG. 9 is a schematic block diagram of the side link communication method 200 according to the embodiment of the present application. As shown in FIG. 9, the method 300 includes a part or all of the following contents.

S310, the network device determines the first parameter.
S320, the network device transmits the first parameter to the terminal device, where the terminal device sets the time domain symbol start position of the physical side link control channel (PSCCH) in one time frequency unit. It is for confirmation.

Optionally, in the embodiments of the present application, the step of determining the first parameter by the network device requires sensing that the network device is set for at least one terminal device in one time frequency unit. The step of acquiring the number of time domain symbols at a certain time and the maximum value K of the number of time domain symbols that the network device needs to sense the at least one terminal device are determined as the first parameter. Includes steps in which K is an integer.

Optionally, in an embodiment of the present application, the step of determining the first parameter by the network device is to transmit the PSCCH set by the network device for at least one terminal device in one time frequency unit. The step of acquiring the required start time domain symbol position and the maximum value M of the start time domain symbol positions that the network device can use for the PSCCH transmission of the at least one terminal device are determined as the first parameter. A step in which M is an integer is included.

Optionally, in the embodiments of the present application, the method also applies the network device to the terminal device at the start time domain symbol position of the PSCCH in one time frequency unit and the end time domain of the PSCCH in one time frequency unit. Symbol position, number of time domain symbols occupied in one time frequency unit of PSCCH, frequency domain start position of PSCCH in one time frequency unit, frequency domain end position of said PSCCH in one time frequency unit, and one time. The step comprises transmitting at least one of the lengths of the PSCCH frequency domain resource in the frequency unit.

Optionally, in the embodiments of the present application, the start time domain symbol position of the PSCCH in one time frequency unit is indicated by index information of the time domain symbol or offset with respect to a particular time domain symbol and / or one time. The frequency domain start position of the PSCCH in a frequency unit is indicated by the index information of the frequency domain unit or the offset with respect to a particular frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in one time frequency unit. Indicated by the size indication information of the frequency domain resource.

Optionally, in the embodiments of the present application, the PSCCH-occupied time domain resource scheduled by the PSCCH is greater than the PSCCH-occupied time domain resource.

Optionally, in the embodiments of the present application, the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources.

Optionally, in the embodiments of the present application, the one time frequency unit comprises one time slot or one subframe in the time domain.

It should be understood that the attractions, related characteristics, functions, etc. between the network device and the terminal device described by the network device correspond to the related characteristics, functions, etc. of the terminal device. That is, which message the network device sends to the terminal device, and the terminal device receives the corresponding message from the network device.

It should be understood that in the various embodiments of the present application, the sequence number of each of the above processes does not imply the order of execution, and the order of execution of each process should be determined according to its function and internal logic. It shall not constitute any limitation on the process of implementation of the embodiments of the present application.

The method of side-link communication according to the embodiment of the present application has been described in detail above, but the device for side-link communication according to the embodiment of the present application will be described below in combination with the drawings of FIGS. 10 to 13, and the method will be implemented. The technical features described in the examples apply to the following embodiments of the device.

FIG. 10 shows a schematic block diagram of the terminal device 300 of the embodiment of the present application. As shown in FIG. 10, the terminal device 300 is
A processing unit 310 for determining the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit,
The time frequency resource includes a transmission / reception unit 320 for transmitting / receiving the PSCCH.

Optionally, in the embodiments of the present application, the processing unit specifically includes the start time domain symbol position of the PSCCH, the number of occupied time domain symbols, and the end time domain symbol position in the first time frequency unit. , Frequency domain start position, frequency domain resource length and frequency domain end position, used to determine at least one type of information.

Optionally, in the embodiments of the present application, the processing unit is specifically used to determine the start time domain symbol position of the PSCCH in the first time frequency unit based on the first parameter.

Optionally, in the embodiments of the present application, the first parameter comprises the position K of the first time domain symbol for receiving PSCCH in one time frequency unit, where K is an integer.

Optionally, in the embodiments of the present application, the processing unit specifically determines the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to K. Used, the transmission / reception unit is specifically used to start transmitting / receiving the PSCCH from the time domain symbol corresponding to the position K of the time domain symbol in the first time frequency unit.

Optionally, in the embodiments of the present application, K is the maximum of the start time domain symbol positions that can be used to transmit the PSCCH corresponding to at least one terminal device in one time frequency unit.

Optionally, in the embodiments of the present application, the first parameter includes a maximum value M of the number of time domain symbols that need to be sensed in one time frequency unit, where M is an integer.

Optionally, in the embodiments of the present application, the processing unit specifically determines the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to (M + i). Here, i is an integer and i is determined based on the subcarrier interval, and the transmission / reception unit is specifically the position of the time domain symbol in the first time frequency unit. It is used to start transmitting and receiving the PSCCH from the time domain symbol corresponding to (M + i).

Optionally, in the embodiments of the present application, the maximum value M is the maximum value among the number of time domain symbols that need to be sensed corresponding to at least one terminal device in one time frequency unit.

Optionally, in the embodiments of the present application, the first parameter is determined by protocol preset information or network device settings.

Optionally, in the embodiments of the present application, the processing unit specifically determines the length of the frequency domain resource of the PSCCH in the first time frequency unit, depending on the aggregation level used for the PSCCH. Used to do.

Optionally, in the embodiments of the present application, the start time domain symbol position in the first time frequency unit of the PSCCH, the number of time domain symbols occupied in the first time frequency unit of the PSCCH, the first. The end time domain symbol position of the PSCCH in the time frequency unit, the frequency domain start position of the first time frequency unit of the PSCCH, the frequency domain end position of the PSCCH in the first time frequency unit, and the first position of the PSCCH. At least one of the lengths of the frequency domain resource in the time frequency unit of is determined by the protocol preset information or the network equipment setting information.

Optionally, in the embodiments of the present application, the start time domain symbol position of the PSCCH in the first time frequency unit is indicated by index information of the time domain symbol or offset with respect to a particular time domain symbol, and / or said. The frequency domain start position of the PSCCH in the first time frequency unit is indicated by the index information of the frequency domain unit or the offset with respect to the particular frequency domain unit and / or the frequency domain of the PSCCH in the first time frequency unit. The length of the resource is indicated by the frequency domain resource size indicator information.

Optionally, in the embodiments of the present application, the PSCCH-occupied time domain resource scheduled by the PSCCH is greater than the PSCCH-occupied time domain resource.

Optionally, in the embodiments of the present application, the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources.

Optionally, in the embodiments of the present application, the one time frequency unit comprises one time slot or one subframe in the time domain.

It should be understood that the terminal device 300 according to the embodiment of the present application can correspond to the terminal device according to the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the terminal device 300 are. Each of them is for realizing the corresponding flow of the terminal device in the method of FIG. 8, and is not repeated here for the sake of brevity.

FIG. 11 shows a schematic block diagram of the network device 400 according to the embodiment of the present application. As shown in FIG. 11, the network device 400 is
The processing unit 410 for determining the first parameter,
A transmission / reception unit 420 for transmitting the first parameter to the terminal device, wherein the first parameter is the time domain symbol start of the physical side link control channel (PSCCH) in the time frequency unit where the terminal device is one. Includes a transmit / receive unit 420, which is for determining the position.

Optionally, in the embodiments of the present application, the processing unit specifically acquires the number of time domain symbols set for at least one terminal device in one time frequency unit that need to be sensed. It is used to determine the maximum value K of the number of time domain symbols that need to be sensed by the at least one terminal device as the first parameter, and K is an integer.

Optionally, in the embodiments of the present application, the processing unit specifically acquires a start time domain symbol position that needs to transmit PSCCH, which is set for at least one terminal device in one time frequency unit. It is used to determine the maximum value M of the start time domain symbol positions that can be used for PSCCH transmission of the at least one terminal device as the first parameter, and M is an integer.

Optionally, in the embodiment of the present application, the transmission / reception unit also to the terminal device, the start time domain symbol position of PSCCH in one time frequency unit, the number of time domain symbols occupied in one time frequency unit of PSCCH, one. The PSCCH end time domain symbol position in the time frequency unit, the PSCCH frequency domain start position in one time frequency unit, the PSCCH frequency domain end position in one time frequency unit, and the PSCCH frequency in one time frequency unit. Used to transmit at least one of the lengths of a domain resource.

Optionally, in the embodiments of the present application, the start time domain symbol position of the PSCCH in one time frequency unit is indicated by index information of the time domain symbol or offset with respect to a particular time domain symbol and / or one time. The frequency domain start position of the PSCCH in a frequency unit is indicated by the index information of the frequency domain unit or the offset with respect to a particular frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in one time frequency unit. Indicated by the size indication information of the frequency domain resource.

Optionally, in the embodiments of the present application, the PSCCH-occupied time domain resource scheduled by the PSCCH is greater than the PSCCH-occupied time domain resource.

Optionally, in the embodiments of the present application, the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources.

Optionally, in the embodiments of the present application, the one time frequency unit comprises one time slot or one subframe in the time domain.

It should be understood that the network device 400 according to the embodiment of the present application can correspond to the network device according to the embodiment of the method of the present application, and the above and other operations and / or functions of each unit in the network device 400 are. Each of them is for realizing the corresponding flow of the network device in the method of FIG. 9, and is not repeated here for the sake of brevity.

As shown in FIG. 12, the embodiment of the present application also provides a terminal device 500, the terminal device 500 may be the terminal device 300 of FIG. 10, and the terminal device corresponding to the method 100 of FIG. Can be used to execute the contents of. The terminal device 500 as shown in FIG. 12 includes a processor 510, which can call a computer program from memory and operate to realize the method according to the embodiment of the present application.

Optionally, as shown in FIG. 12, the terminal device 500 can also include a memory 520. Here, the processor 510 can call a computer program from the memory 520 and operate it so as to realize the method in the embodiment of the present application.

Here, the memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.

Optionally, as shown in FIG. 12, the terminal device 500 can further include a transceiver 530, and the processor 510 can control the transceiver 530 to communicate with other devices, specifically. , Can send information or data to other devices, or receive information or data transmitted by other devices.

Here, the transceiver 530 can include a transmitter and a receiver. The transceiver 530 can further include antennas and may have one or more antennas.

Optionally, the terminal device 500 may be the terminal device of the embodiment of the present application, and the terminal device 500 can realize the corresponding flow realized by the terminal device in each method of the embodiment of the present application. , For the sake of brevity, I will not repeat it here.

In one specific embodiment, the processing unit in the terminal device 300 may be realized by the processor 510 of FIG. The transmission / reception unit in the terminal device 300 may be realized by the transceiver 530 of FIG.

As shown in FIG. 13, the embodiment of the present application further provides a network device 600, the network device 600 may be the network device 400 of FIG. 11, and the network device corresponding to the method 200 of FIG. It can be used to carry out the content. The network device 600 as shown in FIG. 13 includes a processor 610, which can call a computer program from memory and operate to realize the method according to the embodiment of the present application.

Optionally, as shown in FIG. 13, the network device 600 can further include a memory 620. Here, the processor 610 can call a computer program from the memory 620 and operate it so as to realize the method in the embodiment of the present application.

Here, the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.

Optionally, as shown in FIG. 13, the network device 600 can further include a transceiver 630, and the processor 610 can control the transceiver 630 to communicate with other devices, specifically. Information or data can be transmitted to other devices, or information or data transmitted by other devices can be received.

Here, the transceiver 630 can include a transmitter and a receiver. The transceiver 630 can further include antennas and may have one or more antennas.

Optionally, the network device 600 may be the network device of the embodiment of the present application, and the network device 600 can realize the corresponding flow realized by the network device in each method of the embodiment of the present application. , For the sake of brevity, I will not repeat it here.

In one specific embodiment, the processing unit in the network device 400 may be realized by the processor 610 of FIG. The transmission / reception unit in the network device 400 may be realized by the transceiver 630 of FIG.

FIG. 14 is an exemplary structural diagram of the chip of the embodiment of the present application. A chip 700 as shown in FIG. 14 includes a processor 710, which can call a computer program from memory and operate to implement the method of the embodiment of the present application.

Optionally, as shown in FIG. 14, the chip 700 can also include a memory 720. Here, the processor 710 can call a computer program from the memory 720 and operate it so as to realize the method in the embodiment of the present application.

Here, the memory 720 may be a separate device independent of the processor 710, or may be integrated in the processor 710.

Optionally, the chip 700 may further include an input interface 730. Here, the processor 710 can control the input interface 730 to communicate with another device or chip, and can specifically acquire information or data transmitted by the other device or chip.

Optionally, the chip 700 may further include an output interface 740. Here, the processor 710 can control the output interface 740 to communicate with another device or chip, and can specifically output information or data to the other device or chip.

Optionally, the chip may be applied to the terminal device in the embodiment of the present application, and the chip can realize the corresponding flow realized by the terminal device in each method of the embodiment of the present application, and concisely. In order to do so, I will not repeat it here.

Optionally, the chip may be applied to the network equipment in the embodiments of the present application, and the chip may realize the corresponding flow realized by the network equipment in each method of the embodiment of the present application, and concisely. In order to do so, I will not repeat it here.

As should be understood, the chips referred to in the embodiments of the present application may also be referred to as system level chips, system chips, chip systems or system-on-chips and the like.

FIG. 15 is a schematic block diagram of the communication system 800 according to the embodiment of the present application. As shown in FIG. 15, the communication system 800 includes a network device 810 and a terminal device 820.

Here, the network device 810 can be used to realize the corresponding function realized by the network device in the above method, and the terminal device 820 can be used to realize the corresponding function realized by the terminal device in the above method. Can be used to achieve the above, and for the sake of brevity, it will not be repeated here.

As should be understood, the terms "system" and "network" are used herein interchangeably throughout the specification. As used herein, the term "and / or" describes only the relationships of related objects and indicates that three relationships can exist. For example, A and / or B can indicate three situations: A is present alone, A and B are present simultaneously, and B is present alone. Further, in the present specification, the character "/" generally indicates that the related objects before and after are related to "or".

It should be understood that the processor of the embodiment of the present application may be an integrated circuit chip having signal processing capability. In the implementation process, each step of the embodiment of the above method can be completed by a hardware integrated logic circuit or software-type instruction in the processor. The above-mentioned processors include general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (Field Programmable Gate Arrays, etc.), FPGAs, and FPGAs. It may be a device, a discrete gate or a transistor logic device, a discrete hardware component. Each of the disclosed methods, steps and logical block diagrams in the embodiments of the present application can be implemented or performed. The general-purpose processor may be a microprocessor or the processor may be any general processor or the like. The steps combined with the methods disclosed in the embodiments of the present application may be directly embodied as being performed and completed by a hardware decode processor, or may be performed and completed by a combination of hardware and software modules in the decode processor. It may be embodied as a thing to do. Software modules can be located in mature storage media in the art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in memory and the processor reads the information stored in the memory and combines it with its hardware to complete the steps of the above method.

As can be understood, the memory in the embodiment of the present application includes volatile memory or non-volatile memory, or both volatile memory and non-volatile memory. Here, the non-volatile memory includes a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), and an electrically erasable programmable read-only memory. It may be a memory (Electrically EPROM, EPROM) or a flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM) and is used as an external cache. By way of example, but not limited to, various forms of RAM, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchrous DRAM, etc.). DRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate DRAM, DDR DRAM), Extended Synchronous Dynamic Random Access Memory (Enhanced DRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synclink DRAM, SL DRAM) and Direct Rambus. Random access memory (Direct Rambus RAM, DR RAM) can be used. It should be noted that the memory according to the systems and methods described herein includes, but is not limited to, the above memory and other suitable types of memory.

As should be understood, the above memory is exemplary, but not limited, and for example, the memory in the embodiments of the present application is also a static random access memory (static RAM, SRAM), a dynamic random access memory ( Dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, DRAM), double data rate synchronous dynamic random access memory (double data rate DRAM, DDR DRAM), extended synchronous dynamic random access memory (enhanced DRAM, ESDRAM), Synchronous link dynamic random access memory (sync link DRAM, SDRAM) and direct rambus random access memory (Direct Rambus RAM, DR RAM) may be used. That is, the memory in the embodiments of the present application includes, but is not limited to, the above memory and other suitable types of memory.

The embodiments of the present application further provide a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium may be applied to the network equipment in the embodiments of the present application, and the computer may be implemented by the computer program in the corresponding flow realized by the network equipment in each method of the embodiments of the present application. I'm going to do this, and for the sake of brevity, I won't repeat it here.

Optionally, the computer-readable storage medium may be applied to the terminal device in the embodiment of the present application, and the computer is appropriately realized by the mobile terminal / terminal device in each method of the embodiment of the present application by the computer program. To keep the flow running and concise, I won't repeat it here.

The embodiments of the present application further provide computer program products including computer program instructions.

Optionally, the computer program product may be applied to the network equipment in the embodiments of the present application, and the computer may execute the corresponding flow realized by the network equipment in each method of the embodiments of the present application by the computer program instruction. However, for the sake of brevity, I will not repeat it here.

Optionally, the computer program product may be applied to the terminal device in the embodiment of the present application, and the computer is appropriately realized by the mobile terminal / terminal device in each method of the embodiment of the present application by the computer program instruction. To keep the flow running and concise, I won't repeat it here.

The embodiments of the present application further provide computer programs.

Optionally, the computer program may be applied to the network equipment in the embodiments of the present application, and when the computer program is executed on the computer, the computer is appropriately realized by the network equipment in each method of the embodiment of the present application. To keep the flow running and concise, I won't repeat it here.

Optionally, the computer program may be applied to the terminal device in the embodiments of the present application, and when the computer program is executed on the computer, the computer is appropriately realized by the terminal device in each method of the embodiment of the present application. To keep the flow running and concise, I won't repeat it here.

One of ordinary skill in the art can implement each of the exemplary units, algorithms and steps described in the embodiments disclosed herein by means of electronic hardware or a combination of electronic hardware and computer software. It can be recognized that whether these functions are performed in hardware or software depends on the specific use and design limitations of the technical solution. Those skilled in the art may perform the functions described using different methods for each particular application, but such practices should not be considered outside the scope of the invention.

Those skilled in the art will be able to refer to the corresponding processes of the embodiments of the above methods for the specific operating processes of the systems, devices and units described above, for convenience and brevity of description. I will not repeat it here.

It should be understood that in some embodiments of the present application, the disclosed systems, devices and methods can be implemented in other embodiments. For example, the embodiments of the device described above are merely exemplary. For example, the division of the unit is merely a division of a logical function, and another division method may be used in actual implementation. For example, a plurality of units or components may be combined or integrated into another system. Can be done, or some features may be ignored or not performed. On the other hand, the coupling or direct coupling or communication connection between the displays or discussions may be an indirect coupling or communication connection by some interface, device or module, in electrical, mechanical or other form. There may be.

The unit described as the separated component may or may not be physically separated, and the component displayed as a unit may be a physical unit or may not be a physical unit. It may be located in one place or may be distributed in a plurality of network units. The object of the solution of this embodiment can be realized by selecting some or all of the units according to the actual needs.

In addition, each functional unit in each embodiment of this application may be integrated in one processing unit, or each unit may physically exist individually, and two or two or more units are 1 It may be integrated into one module.

The functions are performed in the form of functional units of software and can be stored on a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application can express the essential or the part contributing to the prior art in the form of a software product, and the computer software product is stored in one storage medium. A set of computer devices (such as a personal computer, server, or network device) includes some instructions for performing all or part of the methods described in each embodiment of the present application. The above-mentioned storage medium is a medium that can store various program codes such as a U disk, a mobile hard disk, a read-only storage device (Read Only Memory, ROM), a random access memory (Random Access Memory, RAM), a disk, or a CD. ..

The above description is merely a specific embodiment of the present application, and the scope of protection of the present invention is not limited thereto. Any changes or substitutions that would be readily conceivable within the scope of the art disclosed in this application should be included in the scope of protection of the present invention. Accordingly, the scope of protection of this application should comply with the content of the scope of protection of the claims.

New Radio (NR) -Physical Sidelink Control Channel (PSCCH) and its corresponding physical side to reduce time delay in Vehicle to Everything (V2X). The link shared channel (Physical Sidelink Shared Channel, PSCH ) uses a multiplexing structure different from the structure in Long Term Evolution (LTE) -V2X, but the multiplexing structure used in NR-V2X. Then, how to transmit PSCCH has become a problem to be solved.

Optionally, the start time domain symbol position or end time domain symbol position of the PSCCH in one time frequency unit can be determined by the index information of the time domain symbol or an offset with respect to a particular time domain symbol. For example, if the protocol promises that the PSCCH start time domain symbol position in one time frequency unit is the first time domain symbol, the protocol preset information is the first time domain in one time frequency unit. It can include an instruction domain to indicate the index information of the symbol. Also, for example, for a terminal device, if the network device is set so that the end time domain symbol position of the PSCCH in one time frequency unit is the last time domain symbol, the setting information is the last in one time domain unit. It can contain an instruction domain to indicate the index value of the time domain symbol of. Also, for example, for a terminal device, if the network device is set so that the offset of the PSCCH start time domain symbol position with respect to the fourth time domain symbol in one time frequency unit is 2, the terminal device is one. It becomes clear that the start time domain symbol position of PSCCH in the time frequency unit is the sixth time domain symbol. Also, for example, if the protocol pre-promises that the offset of the PSCCH end time domain symbol position with respect to the fourth time domain symbol in one time frequency unit is -2, the terminal device is one time frequency unit. It becomes clear that the end time domain symbol position of PSCCH in is the second time domain symbol.

FIG. 9 is a schematic block diagram of the side link communication method 200 according to the embodiment of the present application. As shown in FIG. 9, the method 200 includes some or all of the following contents.

S2 10 , the network device determines the first parameter.
S 220, the network device transmits the first parameter to the terminal device, where the terminal device starts the time domain symbol of the physical side link control channel (PSCCH) in one time frequency unit. It is for fixing the position.

Claims (58)

It ’s a side-link communication method.
The step in which the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit,
A method of side-link communication comprising the step of transmitting and receiving the PSCCH in the time frequency resource. The step in which the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit is
The terminal device is the start time domain symbol position of the PSCCH in the first time frequency unit, the number of time domain symbols occupied, the end time domain symbol position, the frequency domain start position, the length of the frequency domain resource and the frequency domain. The method of claim 1, comprising the step of determining at least one of the end positions. The step in which the terminal device determines the start time domain symbol position of the PSCCH in the first time frequency unit is
The method of claim 2, wherein the terminal device comprises a step of determining the start time domain symbol position of the PSCCH in the first time frequency unit based on the first parameter. The method of claim 3, wherein the first parameter comprises the position K of the first time domain symbol for receiving PSCCH in one time frequency unit, where K is an integer. The step in which the terminal device determines the start time domain symbol position of the PSCCH in the first time frequency unit based on the first parameter is
The terminal device comprises a step of determining the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to K.
In the time frequency resource, the step in which the terminal device transmits / receives the PSCCH is
The method according to claim 4, wherein the terminal device includes a step of starting transmission / reception of the PSCCH from the time domain symbol corresponding to the position K of the time domain symbol in the first time frequency unit. The method of claim 4 or 5, wherein K is the maximum of the start time domain symbol positions available for transmission of the PSCCH corresponding to at least one terminal device in one time frequency unit. The method of claim 3, wherein the first parameter comprises a maximum value M of the number of time domain symbols that need to be sensed or measured in one time frequency unit, where M is an integer. .. The step in which the terminal device determines the start time domain symbol position of the PSCCH in the first time frequency unit based on the first parameter is
The terminal device includes a step of determining the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to (M + i), where i is a positive integer and. i is a parameter related to the subcarrier interval,
In the time frequency resource, the step in which the terminal device transmits / receives the PSCCH is
7. The seventh aspect of claim 7, wherein the terminal device includes a step of starting transmission / reception of the PSCCH from the time domain symbol corresponding to the position (M + i) of the time domain symbol in the first time frequency unit. Method. The method of claim 7 or 8, wherein M is the maximum number of time domain symbols that need to be sensed or measured for at least one terminal device in one time frequency unit. The method according to any one of claims 3 to 9, wherein the first parameter is determined by protocol preset information or network device setting information. The step in which the terminal device determines the length of the frequency domain resource of the PSCCH in the first time frequency unit is
Claims 2-10 include the terminal device comprising determining the length of a frequency domain resource of the PSCCH in the first time frequency unit, depending on the aggregation level used for the PSCCH. The method according to any one of the above. The step in which the terminal device determines the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit is
Based on the protocol preset information or the setting information of the network device, the start time domain symbol position of the PSCCH in the first time frequency unit, the number of time domain symbols occupied by the PSCCH in the first time frequency unit, the above. The end time domain symbol position of the PSCCH in the first time frequency unit, the frequency domain start position of the PSCCH in the first time frequency unit, the frequency domain end position of the PSCCH in the first time frequency unit, and the above. The method according to any one of claims 1 to 11, comprising the step of determining information of at least one of the lengths of the frequency domain resource of the PSCCH in the first time frequency unit. .. The start time domain symbol position of the PSCCH in the first time frequency unit is indicated by index information of the time domain symbol or offset with respect to a particular time domain symbol and / or the frequency of the PSCCH in the first time frequency unit. The domain start position is indicated by the index information of the frequency domain unit or the offset with respect to the specific frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in the first time frequency unit is the size indication information of the frequency domain resource. 12. The method of claim 12, wherein is indicated by. The method according to any one of claims 1 to 13, wherein the time domain resource occupied by the PSCCH scheduled by the PSCCH is larger than the time domain resource occupied by the PSCCH. The method according to any one of claims 1 to 13, wherein the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources. The method of any one of claims 1-15, wherein the first time frequency unit comprises one time slot or one subframe in the time domain. It ’s a side-link communication method.
The step that the network device determines the first parameter,
The network device is a step of transmitting the first parameter to the terminal device, wherein the terminal device starts a time domain symbol of a physical side link control channel (PSCCH) in one time frequency unit. A method of side-link communication comprising, including, a step that is intended to determine the position. The step in which the network device determines the first parameter is
A step of acquiring the number of time domain symbols that the network device needs to perform sensing set for at least one terminal device in one time frequency unit.
A step of determining the maximum value K of the number of time domain symbols that the network device needs to sense or measure the at least one terminal device as the first parameter, and a step in which K is an integer. 17. The method of claim 17, wherein the method comprises. The step in which the network device determines the first parameter is
The step of acquiring the start time domain symbol position that the network device can use for transmission of the PSCCH, which is set for at least one terminal device in one time frequency unit.
A step of determining the maximum value M of the start time domain symbol positions that can be used by the network device for transmission of the PSCCH of the at least one terminal device as the first parameter, wherein M is an integer. The method according to claim 17, wherein the method comprises. The method further
The network device to the terminal device the start time domain symbol position of the PSCCH in one time frequency unit, the number of time domain symbols occupied by the PSCCH in one time frequency unit, and the PSCCH in one time frequency unit. End time domain symbol position, frequency domain start position of the PSCCH in one time frequency unit, frequency domain end position of the PSCCH in one time frequency unit, and length of the frequency domain resource of the PSCCH in one time frequency unit. The method according to any one of claims 17 to 20, wherein at least one of the information is transmitted. The PSCCH start time domain symbol position in one time frequency unit is indicated by the index information of the time domain symbol or offset with respect to a particular time domain symbol, and / or the frequency domain start position of the PSCCH in one time frequency unit. It is indicated by the index information of the frequency domain unit or the offset with respect to the specific frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in one time frequency unit is indicated by the size indication information of the frequency domain resource. The method according to claim 20, wherein the method is characterized. The method according to any one of claims 17 to 21, wherein the time domain resource occupied by the PSCCH scheduled by the PSCCH is larger than the time domain resource occupied by the PSCCH. The method of any one of claims 17-22, wherein the PSCCH and the PSCCH scheduled by the PSCCH occupy different time domain resources. The method of any one of claims 17-23, wherein the one time frequency unit comprises one time slot or one subframe in the time domain. It is a terminal device, and the terminal device is
A processing unit for determining the time frequency resource of the physical side link control channel (PSCCH) in the first time frequency unit, and
A terminal device comprising a transmission / reception unit for transmitting / receiving the PSCCH in the time frequency resource. Specifically, the processing unit
Of the start time domain symbol position of the PSCCH, the number of time domain symbols occupied, the end time domain symbol position, the frequency domain start position, the length of the frequency domain resource, and the frequency domain end position in the first time frequency unit. 25. The terminal device according to claim 25, which is used to determine at least one type of information. Specifically, the processing unit
26. The terminal device of claim 26, wherein the terminal device is used to determine the start time domain symbol position of the PSCCH in the first time frequency unit based on the first parameter. 27. The terminal device of claim 27, wherein the first parameter comprises the position K of the first time domain symbol for receiving PSCCH in one time frequency unit, where K is an integer. Specifically, the processing unit
It is used to determine the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to K.
Specifically, the transmission / reception unit
28. The terminal device according to claim 28, which is used to start transmitting and receiving the PSCCH from the time domain symbol corresponding to the position K of the time domain symbol in the first time frequency unit. The terminal device according to claim 28 or 29, wherein K is the maximum value of the start time domain symbol positions that can be used to transmit the PSCCH corresponding to at least one terminal device in one time frequency unit. .. 27. The terminal of claim 27, wherein the first parameter comprises a maximum value M of the number of time domain symbols that need to be sensed or measured in one time frequency unit, where M is an integer. machine. Specifically, the processing unit
It is used to determine the start time domain symbol position of the PSCCH in the first time frequency unit as the position of the time domain symbol corresponding to (M + i), where i is a positive integer and i is a sub. It is a parameter related to the carrier interval and
Specifically, the transmission / reception unit
31. The terminal device according to claim 31, wherein the terminal device is used to start transmitting and receiving the PSCCH from the time domain symbol corresponding to the position (M + i) of the time domain symbol in the first time frequency unit. 31 or 32, wherein M is the maximum number of time domain symbols that need to be sensed or measured for at least one terminal device in one time frequency unit. Terminal equipment. The terminal device according to any one of claims 27 to 33, wherein the first parameter is determined by protocol preset information or network device setting information. Specifically, the processing unit
Any of claims 26-34, characterized in that it is used to determine the length of a frequency domain resource of the PSCCH in the first time frequency unit, depending on the aggregation level used for the PSCCH. The terminal device according to item 1. Specifically, the processing unit
Based on the protocol preset information or the setting information of the network device, the start time domain symbol position of the PSCCH in the first time frequency unit, the number of time domain symbols occupied by the PSCCH in the first time frequency unit, the above. The end time domain symbol position of the PSCCH in the first time frequency unit, the frequency domain start position of the PSCCH in the first time frequency unit, the frequency domain end position of the PSCCH in the first time frequency unit, and the above. The invention according to any one of claims 25 to 35, characterized in that it is used to determine information of at least one of the lengths of the frequency domain resource of the PSCCH in the first time frequency unit. Terminal equipment. The start time domain symbol position of the PSCCH in the first time frequency unit is indicated by index information of the time domain symbol or offset with respect to a particular time domain symbol and / or the frequency of the PSCCH in the first time frequency unit. The domain start position is indicated by the index information of the frequency domain unit or the offset with respect to the specific frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in the first time frequency unit is the size indication information of the frequency domain resource. 36. The terminal device of claim 36, which is indicated by. The terminal device according to any one of claims 25 to 37, wherein the time domain resource occupied by the PSCCH scheduled by the PSCCH is larger than the time domain resource occupied by the PSCCH. The terminal device according to any one of claims 25 to 37, wherein the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources. The terminal device according to any one of claims 25 to 39, wherein the first time frequency unit includes one time slot or one subframe in the time domain. It is a network device, and the network device is
A processing unit for determining the first parameter,
A transmission / reception unit for transmitting the first parameter to the terminal device, wherein the first parameter is the time domain symbol start position of the physical side link control channel (PSCCH) in the time frequency unit of the terminal device. A network device, including a transmit / receive unit, which is intended to determine. Specifically, the processing unit
It is necessary to acquire the number of time domain symbols set for at least one terminal device in one time frequency unit and need to perform sensing or measurement, and to perform sensing or measurement of the at least one terminal device. The network device according to claim 41, wherein the maximum value K of the number of time domain symbols is determined as the first parameter, and K is an integer. Specifically, the processing unit
Acquiring a start time domain symbol position that can be used for transmission of the PSCCH set for at least one terminal device in one time frequency unit, and a start that can be used for transmission of the PSCCH of the at least one terminal device. The network device according to claim 41, wherein the maximum value M of the time domain symbol positions is determined as the first parameter, and M is an integer. The transmission / reception unit further
To the terminal device, the start time domain symbol position of the PSCCH in one time frequency unit, the number of time domain symbols occupied by the PSCCH in one time frequency unit, and the end time domain symbol of the PSCCH in one time frequency unit. Of the location, the frequency domain start position of the PSCCH in one time frequency unit, the frequency domain end position of the PSCCH in the first time frequency unit, and the length of the frequency domain resource of the PSCCH in one time frequency unit. The network device according to any one of claims 41 to 43, which is used for transmitting at least one kind of information. The PSCCH start time domain symbol position in one time frequency unit is indicated by the index information of the time domain symbol or offset with respect to a particular time domain symbol, and / or the frequency domain start position of the PSCCH in one time frequency unit. It is indicated by the index information of the frequency domain unit or the offset with respect to the specific frequency domain unit, and / or the length of the frequency domain resource of the PSCCH in one time frequency unit is indicated by the size indication information of the frequency domain resource. The network device according to claim 44. The network device according to any one of claims 41 to 45, wherein the time domain resource occupied by the PSCCH scheduled by the PSCCH is larger than the time domain resource occupied by the PSCCH. The network device according to any one of claims 41 to 45, wherein the PSCCH and the PSCH scheduled by the PSCCH occupy different time domain resources. The network device according to any one of claims 41 to 47, wherein the first time frequency unit includes one time slot or one subframe in the time domain. A terminal device including a processor and a memory, wherein the memory is for storing a computer program, and the processor calls and operates the computer program stored in the memory, according to claims 1 to 16. A terminal device for carrying out the method according to any one of the following items. A network device including a processor and a memory, wherein the memory is for storing a computer program, and the processor calls and operates the computer program stored in the memory, according to claims 17 to 24. A network device, characterized in that it is for performing the method according to any one of the following items. A chip, including a processor for calling a computer program from a memory and operating, and the device on which the chip is mounted so as to execute the method according to any one of claims 1 to 16. A chip that features that. A chip, including a processor for calling a computer program from a memory and operating, and the device on which the chip is mounted shall execute the method according to any one of claims 17 to 24. A chip that features. A computer-readable storage medium for storing a computer program, wherein the computer performs the method according to any one of claims 1 to 16. Computer readable storage medium. A computer-readable storage medium for storing a computer program, wherein the computer performs the method according to any one of claims 17 to 24 by the computer program. Computer readable storage medium. A computer program product comprising a computer program instruction, wherein the computer performs the method according to any one of claims 1 to 16 by the computer program instruction. A computer program product comprising a computer program instruction, wherein the computer performs the method according to any one of claims 17 to 24 by the computer program instruction. A computer program, wherein the computer causes the computer program to execute the method according to any one of claims 1 to 16. A computer program, wherein the computer causes the computer program to execute the method according to any one of claims 17 to 24.

Images